Beam-scale.



C. SCHENCK.

BEAM SCALE.

(Applicltion filed Feb. 21, 1900.)

Patented Ian. I, l90l.

(lo lpdel.) 2 Sheets-Sheat I.

No'. 664,899. I Patented Ian. 1, I901. c. SCHENCK.

BEAM SCALE.

(Applicltion filed Feb. 21, 1900.) (No Model.) 2 Shasta-Sheet 2.

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TNL uunms PETERS ca, moraumo. wwuucm a c UNITED STATES PATENT OFFICE.

CARL SOI-IENOK, OF DARMSTA DT, GERMANY.

BEAM-SCALE.

SPECIFICATION forming part of Letters Patent No. 664,899, dated January 1, 1901.

Application filed February 21, 1900. Serial No. 6,011. (No model.)

To all whom it may concern:

Be it known that I, CARL SGHENCK, manufacturer, a subject of the Grand Duke of Hesse, residing in Darmst-adt, Grand Duchy of Hesse, in the German Empire, have invented certain new and useful Improvements in Beam-Scales; and I do hereby declare the following to be a full, clear, and exact description of the invention, reference being bad to the accompanying drawings, which form part of this specification.

This invention relates to improved pairs of scales in which a decrease of the amplitude of the oscillations realizes an improvement such that the numbers of the oscillations are increased without decreasing the sensitiveness or, conversely, the sensitiveness is increased without decreasing the number of oscillations. This object is attained by con meeting the two-armed beam of the scales, the arms of which may be equal or unequal, by means of a pull-rod and a strut to a steelyard in such a manner that the latter is suspended to the two-armed lever by the shorter arm length, reckoned from the point of suspension. Hithertoa reduction of the oscillations was obtained by reducing the length of the weighinglever or lengthening the index. This arrangement is applicable with advantage to precision-scales in such a manner that the steelyard is suspended only to one arm of the two-armed lever, whereas in the case of scales for factories and butchers, automatic corn-weighing machines, and the like, where quick weighing and great sensitiveness are required, each arm of the two-armed lever is combined with a steelyard.

The invention is illustrated in the accompanying drawings, in which Figure 1 shows a pair of ordinary beamscales; Fig. 2, com pound beam-scales, which are especially suitable for accurate weighing. Figs. 2, 2 and 2 are details of the knifeedges; Figs. 3 and 3, beam-scales in combination with two steelyards.

As shown in Fig. 1, the loads placed in the scale-pans 1 and 2 act directly on the knifeedges 4 and 5, arranged at the extremities of the two-armed lever 3.

The form of compound beam-scale shown in Fig. 2 is constructed in such a manner that the two-armed lever 1 is connected by a suspension-link 2 to the shorter arm of the steelyard 3, which rests and can turn on the bracket 5 by means of a knife-edge and carries at its other end the scale-pan 6, in which the weights are placed. The latter may, however, be replaced by a running weight. The bracket or arm 5 projects horizontally from the post 8 below the scale-beam and is shorter than such beam. The load acts on the knifeedge 7 of the two-armed lever pivoted on pillar S.

Fig. 2 shows the support of the two-armed lever 1 by means of knife-edge 9 and fulcrumed centrally on pillar 8.

Fig. 2" shows the arrangement of knifeedge 4 on the bracket-arm 5.

Suspension-link 2 is connected in the manner shown in Fig. 2" with the knife-edges l0 and 11 of the two-armed lever and steelyard 3, so that the steelyards and the scale-beam will always oscillate in the same direction.

Figs. 3 and 3 show a form of the invention which is applicable to factory,automatic,corn, and other trade weighing-machines and permits of objects being weighed quickly and with great sensitiveness.

As shown in Fig. 3, the two-armed lever 1, which swings on knife-edge 2, has both of its arms connected by links 3 and 4, respectively, to the two steelyards 5 and 6, which turn on the knifeedges 7 and 8. The latter bear against the arms of the pillar 9. Both scalepans 10 and 11 for the receipt of the weights and loads are suspended to the end of the steelyards, which are provided with indexes l2 and 13, which cooperate with indexes 14 and 15, so as to show the amplitude of the oscillations. This form of beam-scales combines great sensitiveness with a comparative quickness of action and as such is of great advantage in metallurgical works which treat valuable raw materials and where powerful and accurate scales are required.

Having thus described my invention, what I claim is A scale composed of a post, a beam centrally f ulcru med thereto, an arm shorter than the beam and projecting laterally from the 2 eeegeee post below the beam, a lever carrying at In Witness whereof Ihave hereunto signed one end a Weight and fnlcrnmed at its other my name in the presence of two subscribing end to the arm, and a link fulcrnined by a I Witnesses. knife-edge to the bezun, and from which the I lever is suspended by a second knife-edge in- Witnesses: tei'mediate the Weight and the lever-fu1crnm, JEAN GRUND, substantially as specified. RICHARD GUENTHER.

CARL SOHENGK. 

